If you're a Premium user, you can add titles to a Space so all the members of that Space, whether they're Premium or Basic users, will be able to read or listen to them.
Here's how to do it:
Open the title you'd like to add to a Space.
Tap on the bookmark icon in the top right corner of the screen.
This will automatically add the Blink to your saved title, if it wasn't already. Tap on "Change".
Select the Space(s) you'd like to add this title to.
Did you change your mind? You can always remove a title you recommended from a Space.